Puppet, hiera and erb – erb would not recognize array

It looks like you're intending to pass in a array of routes to net::addr in a routes name, but you've defined it as taking the 4 keys of each route rather then the route array. Try the following and see if it works any better.

node test{
    net::addr { 'routing':
        routes => {
            route1 => {
                address => '172.29.54.70',
                netmask => '255.255.255.0',
                gateway => '172.29.54.65',
                dev     => 'eth0',
            },
            route2 => {
                address => '192.168.1.3',
                netmask => '255.255.255.0',
                gateway => '192.168.1.1',
                dev     => 'eth3',
            },
        }
    }
}

and

define net::addr (
  $routes={},
) {
    file { "route-${name}":
        ensure  => 'present',
        mode    => '0644',
        owner   => 'root',
        group   => 'root',
        path    => "/etc/sysconfig/network-scripts/route-${name}",
        content => template('network/addr.erb'),
    }
}

Edit: Fixed typo, padding to get by edit character limit

Syntax looks good. Looks like bug 17474 - the false value isn't loading correctly.

As a workaround until 3.2 is out, maybe use a string?